Exercise brick



FIG. 1 is a perspective view of the exercise brick;

FIG. 2 is a front view of the exercise brick; the rear view being a mirror image thereof;

FIG. 3 is a top view of the exercise brick; the bottom view being a mirror image thereof;

FIG. 4 is a right side view of the exercise brick; the left side being a mirror image thereof; and,

FIG. 5 is a perspective view of the exercise brick shown in use.

The broken lines shown in the drawings illustrate portions of the exercise brick that form no part of the claimed design.

The broken lines in FIG. 5 showing the figure and additional brick in use illustrate environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for an exercise brick, as shown and described. 